Issue Roundcube: Connection failed to imap or storage server

[marvine]

Server operating system version

Almalinux 9.5

Plesk version and microupdate number

18.66 U2

Hi All,

I have setup a new plesk server while back but when updating plesk to the latest version i get underneath messages when logging in to roundcube webmail:

Connection with imap server failed
Connection to storage server failed.

The strangest thing is that i see not any log related to roundcube or what goes wrong.

Thanks in advance!

 

[marvine]

Also tried uninstalling the Roundcube component from Plesk and re-installing it without result.
Diagnose and repair also don't find anything.

And dovecot is running normally
● dovecot.service - Dovecot IMAP/POP3 email server
Loaded: loaded (/usr/lib/systemd/system/dovecot.service; enabled; preset: disabled)
Drop-In: /usr/lib/systemd/system/dovecot.service.d
└─respawn.conf
Active: active (running) since Thu 2025-01-16 14:24:48 CET; 2h 9min ago
Docs: man:dovecot(1)
Dovecot CE documentation
Main PID: 1277 (dovecot)
Status: "v2.3.21.1 (d492236fa0) running"
Tasks: 5 (limit: 100192)
Memory: 11.6M
CPU: 109ms
CGroup: /system.slice/dovecot.service
├─1277 /usr/sbin/dovecot -F
├─1378 dovecot/anvil
├─1380 dovecot/log
├─1383 dovecot/config
└─6766 dovecot/stats

 

[Raul A.]

Hi,

Please check the Rouncube error log in /var/log/plesk-roundcube/errors.

For additional information about Rouncube in Plesk please see https://support.plesk.com/hc/en-us/...rvices-logs-and-configuration-files#roundcube

Roundcube uses the global Apache log as an access log and it can be checked at /var/log/httpd/access_log

 

[marvine]

Hi Raul,

/var/log/httpd/access_log here i see ipadress - - [16/Jan/2025:18:00:54 +0100] "POST /?_task=login HTTP/1.1" 401 2139 "https://webmail.user.nl/?_task=login" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36"

/var/log/plesk-roundcube/errors is empty.

So dont have many logs to see what error is triggering.

 

[Raul A.]

Try to reinstall Roundcube by removing it from Plesk Installer. Afterwards, install it back from Plesk Installer.

 

[marvine]

I also did try that but doesnt solve the issue unfornate

[16/Jan/2025:18:00:54 +0100] "POST /?_task=login HTTP/1.1" 401 2139
But the 401 message will say something denied right ?

 

[scsa20]

Do you have Plesk Premium Email installed? If so, do you plan on using it? If you don't plan on using it, uninstall that, otherwise refer to https://support.plesk.com/hc/en-us/...-Premium-Email-is-installed-Connection-failed

You can also look at https://support.plesk.com/hc/en-us/...o-storage-server-failed-process-limit-reached and see if this falls in line with your issue/resolves it.

 

[scsa20]

Another good article to check as well is https://support.plesk.com/hc/en-us/...h-Dovecot-Connection-to-storage-server-failed

 

[marvine]

Hi,

Thanks did try this one but unfortunatly didnt help anyone have more suggestions and dont have the plesk premium mail installed.
Also do someone know why my /var/log/plesk-roundcube/errors is empty?

Another good article to check as well is https://support.plesk.com/hc/en-us/...h-Dovecot-Connection-to-storage-server-failed

 

[Sebahat.hadzhi]

@marvine could you please check /var/log/maillog and confirm if you get any SSL-related errors?

 

[marvine]

Hi, i also checked that one again but nothing to see not any error message.
Mail works just fine but Roundcube webmail is not able to connect to something tried to reinstall dovecot roundcube some other sugetionst chatgpt did make but not any result.

But don't understand why /var/log/plesk-roundcube/errors is empty ?

 

[Raul A.]

/var/log/plesk-roundcube/errors should contain only PHP errors:

/usr/share/psa-roundcube/config/php.ini.tpl:display_errors = Off
/usr/share/psa-roundcube/config/php.ini.tpl:log_errors = On
/usr/share/psa-roundcube/config/php.ini.tpl:error_log = "/var/log/plesk-roundcube/errors"

You can try to add in /usr/share/psa-roundcube/config/config.inc.php

// system error reporting, sum of: 1 = log; 4 = show
$config['debug_level'] = 4;

// Log SQL queries
$config['sql_debug'] = true;

// Log IMAP conversation
$config['imap_debug'] = true;

// Log LDAP conversation
$config['ldap_debug'] = true;

// Log SMTP conversation
$config['smtp_debug'] = true;

Remember to comment them out after the issue is resolved.

Do the DB login details from $config['db_dsnw'] (/usr/share/psa-roundcube/config/config.inc.php) work on your server?

What do you have in /usr/share/psa-roundcube/config/defaults.inc.php?

Key points:

$config['log_driver'] = 'file';
$config['log_dir'] = '/var/log/plesk-roundcube/';
// Log sent messages to <log_dir>/sendmail.log or to syslog
$config['smtp_log'] = true;

// Log successful/failed logins to <log_dir>/userlogins.log or to syslog
$config['log_logins'] = false;

// Log session debug information/authentication errors to <log_dir>/session.log or to syslog
$config['session_debug'] = false;

// Log SQL queries to <log_dir>/sql.log or to syslog
$config['sql_debug'] = false;

// Log IMAP conversation to <log_dir>/imap.log or to syslog
$config['imap_debug'] = false;

// Log LDAP conversation to <log_dir>/ldap.log or to syslog
$config['ldap_debug'] = false;

// Log SMTP conversation to <log_dir>/smtp.log or to syslog
$config['smtp_debug'] = false;

// Log Memcache conversation to <log_dir>/memcache.log or to syslog
$config['memcache_debug'] = false;

// Log APC conversation to <log_dir>/apc.log or to syslog
$config['apc_debug'] = false;

// Log Redis conversation to <log_dir>/redis.log or to syslog
$config['redis_debug'] = false;

 

[marvine]

After more investigating i changed in the default config file imap and smtp from localhost to 127.0.0.1 and now it works.
But what could be that localhost dont work now after update does that file change ?

 

[marvine]

But of course after updating to Plesk Obsidian 18.0.67 Update #2 the same problems reappear.
Does anyone have idea why localhost wont work but 127.0.0.1 works with roundcube ?

 

[Raul A.]

Can you ping localhost from your server? Does localhost resolve to 127.0.0.1?

 

[marvine]

Hi Raul,

Yes thats possible

[root@... ~]# ping localhost
PING localhost.localdomain (127.0.0.1) 56(84) bytes of data.
64 bytes from localhost.localdomain (127.0.0.1): icmp_seq=1 ttl=64 time=0.051 ms

 

[marvine]

Can someone from plesk take a look into this its very weird problem ??

 

[Kaspar]

@marving, I suggest opening a support ticket with Plesk to let support engineers investigate the issue on your server. Because this does not look like a generic issue, rather seems specific to your server.

 

[marvine]

Yes thats probally the best most of time i can solve it myself or with little help but i looked at everything i know.